Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of Insights into Tanning Biology and Tanning Products JCAD The Journal of Clinical and Aesthetic Dermatology Melanotan II (Tan Jabs): Why They're Not Worth The Risk Nasal tanners claim to work by using Melanotan II, a chemical that darkens skin pigmentation. It is illegal to sell medicinal products containing Melanotan II in the UK but since the tanners are sold Say No to Nasal Tanning Sprays Dermatology Times